The ZR-4 Diver is a premium timepiece designed specifically to withstand the physical realities of deep water diving up to 30 atmospheres of pressure. The ZR-4 Diver has vintage ‘70s diver influences with its large, round shape [53mm], big bold luminescent painted numbers, custom silicone rubber strap, and rotating bezel with engraved indices. The bezel also features knurling on the outside edge marking 0 to 15 minutes. The ZR-4 Diver is finished with a hardened mineral crystal and 316L marine-grade, stainless steel screw-down crown – all designed to increase its strength and durability.